Insulating means



Feb. 2?, 1923. 1,446,983

o. J. MELLGREN INSULRTING MEANS Filed Feb. 4:, 1921.

ated like a mortar.

Patented Feb. 27, 1923.

UNITED STATES OLOF JONATHAN MELLGREN, OF GOTTENBORG, SWEDEN.

INSULATING MEAN S.

Application filed February 4, 1921. Serial No.442,510.

To all whom it may concern.

Be it known that I, OLOF JONATHAN Mum.- cnux, a subject of the King ofSweden, residing at Gottenborg, Sweden, have invented certain new anduseful Improvements in Insulating Means, of which the following aspecification.

This inventlon relates to insulating of powdered structure withoutmixing it with a moist binding material such as is the case with theplurality of powder shaped insulating materials hitherto known.

A further object of this invention is to facilitate the use of certaincheap materials which possess a rather high insulating effect but whichhave not been able to utilize before because of their structure having anonconvenient feature for application upon the surface to be insulated.

It is known to preform materials for the insulating of pipes or the likeagainst heat or cold in the form of cushions or plaits. Insulatingmaterials of a powdered structure must be silted up with a bindingmember whereupon the mass thus produced is aplied upon the pipe or otherpart to be insu- Said forms of the insulating material, however, requirea lot of preparatory operation either for the manufacture of thecushions or plaits or for the application of the mortarlike material.Especially the last mentioned form of the insulating material is a verydisadvantageous operation partly on account of the fact, that theoperation can be erformed only on hot surfaces so as to ena le theevaporation of the water in the mortar, partly depending thereupon, thatprofessionally skilled people must be used for the purpose and finallythereupon that plenty of time must be spent to wait for the drying of analready applied layer of the mortar-like mass before the next layer canbe worked.

This invention consist therein that pow-,

der shaped insulating materials are filled into hose-shaped coveringsmanufactured of a soft flexible material.

The hoseshaped bodies such filled with insulating ma terials then arewrapped round the objectwhich has to be insulated. It is advisable. todip the filled hose into water-glass or'a similar solution in order toairtight close up the pores in the covering and further the hoses whenapplied upon the pipe may be coated with some tightingmeans or beencircled with a bandage as hitherto is usual when insulat-ing pipes orsimilar parts.

In the accompanying drawing there is diagrammatically shown anembodiment of the insulating device.

Fig.1 shows partly in section a hose-like covering filled with theinsulating material,

Figure 2 a perspective view of a pipe insulated in accordance to thisinvention, and

Figure. 3 a section of a pipe such insulated.

The powdered material which may consist of any suitable insulatingmaterial as for instance fine-ground bark of pine is filled up in ahoselike covering manufactured of a. soft, flexible material as forinstance linen or tricot cloth, whereupon the ends of the hose whenfilled are tied u the powder to escape. In Figure 1 the covering isindicated by reference figure 1. The insulating material by 2 and theties at the ends of the hose by 3. 1 h

It is to recommend, when insulating a pipe 4 (Figure 2), to apply theinsulating hoses in such a way, that no inactive interruptions arise forwhich purpose the hoses conveniently may be performed in such a manner,that outside the tied ends there is left an empty portion 5 of the hose,which when joining the hose with another hose can be telescopicallydrawn over the end-portion of the adjacent hose, as shown on the righthand in Figure 1 where the joint is secured by means of a cord 6. InFigure 2 there is shown how a bandage 7 can be wrapped round the pipewhen insulated. As already mentioned this bandage then may be coatedwith a protecting material such as waterglass, oil-paint or any othersuitable coating.

For the insulating of pipes of different sizes or for insulating againsttemperatures of different height there may be used hoses of differentdiameters. As, however, a too thick insulating hose is rather difficultto wrap round the pipes and furthermore does in order to prevent theinsulating hoses with an uniform, comparatively small diameter and, whennecesllld sary, wrap a plurality of such narrow hoses outside eachother. In this way the outer Tin i ilating material tov escape or to bedisplaced,

- y if the hosecovering should be destroyed.

" injurious efi'ect upon the insulating capacity,

inasmuch as the bandage 7 or the paint coating gives the whole anentirely tight outer surface which prevents the powdered insu- Althoughthe invention .according'to the title above refers to the insulating ofpipes or the like, I do not limit myself to objects which strictlyspeaking are to be reckoned as pipes. For instance the method and thedevice according to this invention can be ap plied forinsulating ofsteam boilers, work-- cylinders of steam-engines, compressors, pumps orthe like and also of boilers for treating of sulphite pulp or for otherof technical apparatus. Having thus described my invention and how it isto be performed what I claim is:

An insulating means ready to be applied upon a pipe or any other objectto be insulated against high or low temperatures comprisingsubstantially finely ground bark of pine, free from any bindingingredients and enclosed within a flexible cover.

In testimony whereof I have afiixed my signature.

OLOF JONATHAN MELLGREN.

